A Window to the Siddur is a commentary on the prayer book, written in dialogue format. It focuses on the themes, the order, and the historic background of the weekday and Shabbat prayers.

Praise for A Window to the Siddur:

"Rabbi Dr. Walter Orenstein introduces us to the philosophical and halakhic concepts of Tefillah through the dialogues of a husband and wife studying the Siddur. What a wonderful medium to absorb the knowledge without going through the endless tomes, pages, and sources. This book will give the reader an insight into the hashkafic concepts in the Siddur and thereby inspire one to pray with greater fervency and understanding."–Rabbi Meir Bilitsky, Senior Rabbi, Young Israel of New Hyde Park; Dean, Yeshiva Har Torah